scholarly journals Use of Pyrotechnic Mixtures for Mining of Block Deposits

2019 ◽  
Vol 10 (1) ◽  
pp. 271
Author(s):  
Józef Pyra ◽  
Andrzej Maranda ◽  
Bogdan Florczak ◽  
Rostyslav Zrobok
Keyword(s):  
Specific Energy ◽  
Oxygen Balance ◽  
Gas Generator ◽  
Combustion Heat ◽  
Air Blast ◽  
Gaseous Products ◽  
Product Gas ◽  
Gas Generators ◽  
Pyrotechnic Mixtures ◽  
Granite Quarries

The article presents the results of estimates of thermodynamic parameters (oxygen balance, pressure, temperature, gaseous products produced in the reaction, specific energy, and the combustion heat) for 11 pyrotechnic mixtures and the final product—gas generator prototype (RSP), which can be used in mines for producing blocks. In addition, formal and legal considerations have been presented, as well as the results of gas generators in Polish mines. In order to compare the effects induced by using a detonating cord and a gas generator prototype, a test was carried out in granite quarries involving the measurement, at the same points, of vibration and the air blast. As a result of the tests, limitations and possibilities of using gas generators were indicated.

Effects of Zn on Pyrolysis Characteristics of Shenhua Lignite

2014 ◽  
Vol 1008-1009 ◽  
pp. 247-251
Author(s):  
Wipawan Sangsanga ◽  
Chuan Na ◽  
Jin Xiao Dou ◽  
Jiang Long Yu
Keyword(s):  
Pyrolysis Temperature ◽  
Fixed Bed ◽  
Coal Pyrolysis ◽  
Pyrolysis Gas ◽  
Gaseous Products ◽  
Pyrolysis Characteristics ◽  
Maximum Value ◽  
Product Gas ◽  
Zn Content ◽  
Catalytic Effects

The catalytic effects of Zn on the release of the gaseous products during pyrolysis of Shenhua lignite was investigated by using a fixed-bed quartz reactor. The product gas compositions from the coal pyrolysis were analyzed by a gas chromatography (GC). Experimental results show that Zn had noticeable catalytic effects on lignite pyrolysis. With the increase in Zn content, lignite weight loss increases during pyrolysis. However, there was an optimum content for amount Zn into the coal. Pyrolysis temperature had a great impact on the composition of pyrolysis gas. As the pyrolysis temperature increased, char yield decreased and gas yield increased. There existed a temperature that tar yield reached its maximum value.

IMPROVING THE EFFICIENCY OF HOT GAS GENERATORS FOR HEATING AUTOMOTIVE EQUIPMENT

2021 ◽  
Vol 2 (143) ◽  
pp. 46-53
Author(s):  
Andrey V. Negovora ◽  
◽  
Makhmut M. Razyapov ◽  
Arseniy A. Kozeyev
Keyword(s):  
Heat Pipe ◽  
Thermal Energy ◽  
Thermal Power ◽  
Research Purpose ◽  
Gas Generator ◽  
Thermoelectric Converter ◽  
Remote Monitoring System ◽  
Hot Gas ◽  
Safety Research ◽  
Gas Generators

Hot gas generators are used as a source of thermal energy for pre-start preparation of motor vehicles in cold climatic conditions. Their wide application is due to the high thermal power and safety. (Research purpose) The research purpose is in determining the possibilities of using thermoelectric modules to reduce the energy consumption of the battery by hot gas generators. (Materials and methods) Authors used research methods based on the application of standard techniques, while the object of research was the power supply system of a thermal energy source. (Results and discussion) Authors conducted research on ways and methods to reduce the electric consumption of a hot gas generator by recuperating thermal energy into electrical energy using thermoelectric generator modules. The thermoelectric converters installed on the heat pipe of the hot gas generator, due to the high temperature difference, will allow to obtain a high value of the electromotive force. Modeling of the nozzle in the software package of the Ansys three-dimensional modeling system showed that part of the heat energy goes through the surface of the heat pipe. The article proposes the use of a nozzle with a thermoelectric converter installed on the outer surface of the cylinder instead of a heat pipe. The article presents the mathematical model of an improved hot gas generator nozzle. (Conclusions) The use of a thermoelectric converter for the utilization of thermal energy and the replacement of energy losses of the battery, which feeds the hot gas generator, will reduce the internal power losses of the battery and increase the technical readiness of automotive equipment. The introduction of a comprehensive heat treatment system, which is intelligently and functionally linked to a remote monitoring system, will significantly increase the service life of the units most exposed to temperature influences.

Condition Monitoring at Bulls Bridge Power Station

1983 ◽  
Author(s):  
K. N. Addrison ◽  
M. L. G. Hill
Keyword(s):  
Gas Turbine ◽  
Condition Monitoring ◽  
Gas Generator ◽  
Power Station ◽  
Power Turbine ◽  
Gas Generators

The Station chosen for the trial was Bulls Bridge Gas Turbine Station, sited near London Airport. (See Fig 1-1). Bulls Bridge contains 4, 70 MW sets; each 70 MW unit being powered by 4 Industrial Olympus gas generators, two at either end of a central alternator, (See Fig 1-2). At each end of the alternator, power is supplied via a clutch, to a shaft on which is mounted two power turbines, each driven by a single Olympus gas generator. Thus gas paths are separate between intake and final exhaust, and therefore each gas generator/power turbine assembly can be analysed without being unduly affected by associated plant.

Environmental Impacts of Forest Fires on the Territory of Irkutsk Oblast

2017 ◽  
Vol 21 (3) ◽  
pp. 46-49
Author(s):  
S.S. Timofeeva ◽  
V.V. Garmyshev
Keyword(s):  
Retrospective Analysis ◽  
Environmental Impacts ◽  
Forest Fires ◽  
Irkutsk Oblast ◽  
Total Production ◽  
Oxygen Balance ◽  
Environmental Load ◽  
Gaseous Products ◽  
Stationary Sources

There was performed retrospective analysis of the environmental impacts on the territory of Irkutsk Oblast. There was found that the average environmental load by solid and gaseous products of combustion accounts for 10 % of total emissions from stationary sources of pollutions discharge. There was calculated oxygen balance and found that the forest fires destroyed about 12 % of total production oxygen.

Thermochemical analysis of Palm Oil Wastes as fuel for Biomass Gasification

2013 ◽  
Vol 62 (3) ◽  
Author(s):  
Bemgba Bevan Nyakuma ◽  
Anwar Johari ◽  
Arshad Ahmad
Keyword(s):  
Palm Oil ◽  
Mineral Content ◽  
Large Fraction ◽  
Ghg Emissions ◽  
Clean Energy ◽  
Electricity Production ◽  
Combustion Heat ◽  
Heating Value ◽  
Gaseous Products ◽  
Increasing Trend

The production of palm oil in Malaysia generates large quantities of solid waste annually. A small fraction is currently utilized for steam and electricity production in palm oil mills. However, a large fraction is openly combusted or incinerated resulting in increased greenhouse gas (GHG) emissions. Gasification is considered to be a promising technology for converting bio waste into clean energy. It involves the partial oxidation of carbonaceous materials into gaseous products at high temperatures. This study is aimed at evaluating the thermal and physical properties of EFB, Shell and Fibre palm oil waste as gasification fuel. This is vital for the design, optimization and operation of biomass gasifiers. Consequently, the heating value (HHV), specific heat (c), combustion rate (CR), combustion heat (Q) of the wastes were determined. The results showed that the c, CR, Q displayed an increasing trend in the order EFB, Shell and Fibre. Furthermore, c, CR, Qwere significantly influenced by the organic and mineral content of the fuels. The results for heating value were EFB 17.97 MJ/kg, Fibre 18.71 MJ/kg and Shell 19.07 MJ/kg.

scholarly journals Pyrotechnic mixtures for production of gas generator charges for Base Bleed projectiles based on ascorbic acid as an organic fuel

2016 ◽  
Vol 66 (3) ◽  
pp. 21-26
Author(s):  
Jelena Petkovic-Cvetkovic ◽  
Vladimir Milovic ◽  
Sinisa Pasagic ◽  
Danica Simic ◽  
Ljiljana Jelisavac ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Organic Fuel ◽  
Gas Generator ◽  
Pyrotechnic Mixtures ◽  
Base Bleed

scholarly journals TECHNICAL CONDITION CONTROL ALGORITHM GAS GENERATORS OF STORAGE SYSTEMS AND HYDROGEN SUPPLY IN THE CONTEXT OF THEIR FIRE PREVENTION

2021 ◽  
Vol 1 (161) ◽  
pp. 284-289
Author(s):  
Y. Abramov ◽  
V. Kryvtsova ◽  
A. Mikhailyuk
Keyword(s):  
Direct Methods ◽  
Transmission Efficiency ◽  
Technical Condition ◽  
Fire Prevention ◽  
Gas Generator ◽  
Indirect Methods ◽  
Average Value ◽  
Gas Generators ◽  
Methods Of Control

Algorithms for the control of the technical mill of gas generators in the systems of protection and supply of water, as an element of the systems of fire prevention. Algorithms for monitoring the dynamic parameters of gas generators of gas generators to control the flow and transmitting test signals to two types - from the viewer of the linearly growing function, or from the viewer of the straightforward view. One hundred percent before such test signals are broken down direct and indirect methods of control of the technical mill of gas generators in the systems of recovery and supply of water. It is shown that in the implementation of direct methods of control, no middle value of the parameters in the gas generators begins. To such parameters, the transmission efficiency is applied and continuously for an hour, as they characterize the dynamic power of gas generators in the systems of securing and supplying water. When implementing indirect methods of control, the integral characteristics of gas generators begin. In the quality of the information parameters, which are used to formulate the control algorithms, vibrating the vice in the empty gas generator of any average value. The values ​​of these parameters are changed at two april given time of the hour, or at april given interval hour. In the quality of the criteria for the result of the control of the technical mill of the gas generators, the tolerance criteria are determined. It is shown that the priority in the vibration of the algorithm for the control of the technical mill of gas generators in the systems of gas generators and the supply of gas generators to the algorithm, which is based on the test signal in the form of a straight-flow gas generator. It should be considered that, when implementing such an algorithm, the control of the technical mill of gas generators in the systems of ensuring that the supply of vitality is kept to a minimum is minimal.

STUDI KASUS PROSES INERTING TANKI MUATAN PADA KAPAL MT. GAS WALIO DALAM RANGKA PERSIAPAN DOCKING

2021 ◽  
Vol 12 (2) ◽  
pp. 80
Author(s):  
Teguh Purnomo ◽  
Nazarudin Sinaga ◽  
Nafi Almuzani
Keyword(s):  
Theory And Practice ◽  
Dew Point ◽  
Inert Gases ◽  
Inert Gas ◽  
Repair System ◽  
Gas Generator ◽  
Maintenance And Repair ◽  
Gas Generators ◽  
Special Process

In handling cargo, some types of ships have different ways. On gas tankers containing LPG, a special process is required in avoiding explosions in cargo tanks and avoiding the waste of cargo into the atmosphere. The process of handling the payload is the inerting porses on the payload tank. This process includes inert gas with oxygen levels of less than 8% to prevent the formation of fire triangles in the payload tank so as to avoid explosions. Inert gas is produced by an engine in the form of an Inert Gas Generator. Inert gas generators have several components, the process of which is interconnected with each other to produce inert gases. Inert gas generators require a good and correct maintenance and repair system considering the purpose of inserting inert gas into the payload tank is significant in terms of safety and security on board. Case study on board MT. Walio gas observes the activities of the inerting process that is disrupted by the waste of inert gas into the atmosphere and has a high dew point value so that inert gas does not enter the tank load. From the results of the case study intended that the components on the gas generator inert do not function properly, some analysis is done by observing the continuity of the process and written data so that it is expected that the case study has the benefit in theory and practice in handling the continuity of the inerting process.

Pressure Pulsations in Reciprocating Compressor Delivery Systems

1966 ◽  
Vol 8 (2) ◽  
pp. 141-151 ◽  
Author(s):  
F. J. Wallace
Keyword(s):  
Theoretical Approach ◽  
Wave Theory ◽  
Delivery Systems ◽  
Pressure Pulsations ◽  
Mean Flow ◽  
Gas Generator ◽  
Free Piston ◽  
Mean Pressure ◽  
Gas Generators ◽  
The Mean

In an earlier paper (1)†, the author discussed the nature of pressure pulsations in suction systems of free-piston gas generators, and in particular various forms of pulsation damping devices. A theoretical approach was based on a simple linear treatment of the system, i.e. (1) regarding all pressure pulsations as small in relation to the mean pressure on which they are superimposed, (2) treating dissipative elements (pipe friction or concentrated restrictions) as having linear pressure drop-velocity relationships about the mean flow condition, and (3) treating all distributed elements as having wave motion in accordance with small wave (2) or acoustic theory (rather than the non-linear finite wave theory (3) (4)). Although the physical conditions in compressor delivery systems are very different from those in gas generator suction systems, a similar theoretical approach, verified by acoustic model tests, has been found both to provide a good insight into the problem, and to give an acceptably accurate quantitative indication of pressure pulsation amplitudes. For this purpose systems have been divided into: (1) lumped impedance systems, (2) distributed impedance systems.

The Development of the Olympus “C” Gas Generator

1979 ◽  
Author(s):  
C. H. Green ◽  
C. J. Bean
Keyword(s):  
Gas Turbines ◽  
Advanced Technology ◽  
Combustion System ◽  
Gas Generator ◽  
Service Operation ◽  
Successful Design ◽  
Gas Generators ◽  
Identification Analysis ◽  
Cycle Temperature ◽  
Significant Milestone

Firmly based on the well established Olympus “A” and “B” gas generators, the successful design and development of a 30 percent more powerful version, the Olympus “O,” specifically for industrial and marine operation, represents a significant milestone in the use of compact gas turbines in these fields. Producing 33 EGMW, the re-design of the gas generator turbines and combustion system to introduce more advanced technology permitted the raising of the maximum cycle temperature by 140 K. The engineering program from project concept through basic development and launch to successful commercial service operation is described with particular emphasis on problem identification, analysis, and solution.

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